Ventilating attachment for bowls of lighting-fixtures.



A. COPELAND.

VENTILATING ATTACHMENT FOR BOWLS 0F LIGHTING FIXTURES.

APPLICATION FILED JUNE 5.191-5.

1 1 86,080, I Patented June 6, 1916.

ADOLPH COPELAND, OF CHICAGO, ILLINOIS.

VENTILATING ATTAOHMENT FOR BOWLS OE LIGHTING-FIXTURES.

Application filed June 5, 1915.

To all whom it may concern:

Be it known that I, ADoLrH COPELAND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Ventilating Attachments for Bowls of Lighting-Fixtures, of which the following is a specification.

Hy invention relates to an improved ventilating attachment for semi-indirect bowls, and is especially designed for use in connection with semi-indirect lighting fixtures for either tungsten or nitrogen lamps.

The main object of my invention is to provide a simple, durable, economical and efficient ventilating attachment for the bowls of semi-indirect lighting fixtures.

A further object is to furnish an attachment which not only constitutes a reliable and e'iiicient means for ventilating the bowl, but which also serves to supply an ornamental and attractive finish to the said bowl.

Another object of the invention is to provide an easily-removable ventilating attachment for the bottom portion of an openmouthed bowl or globe without destroying the symmetry of the globe, said attachment being so constructed that by turning it to the right it will be securely locked in its proper position against accidental displacement or removal, and by turning it to the left it may be readily removed from the bottom of the globe, thereby allowing all foreign accumulations and insects to fall out of the opening; left by the removal of said at tachments.

The foregoing and such other objects as may occur from the ensuing description, are attained by the means hereinafter more fully described, and by the combination, construction, arrangement and location of the parts such as illustrated in the accompanying drawings and particularly set forth in the claims appended hereto.

Reference now being had to the accompanying drawings which form a part of this specification and in which similar numerals of reference indicate like parts throughout the several views, it will be seen that Figure 1, illustrates a side elevation of the device embodying my invention. Fig. 2, is a central vertical section of the improved ventilating attachment secured in position to the lower portion of the bowl or globe, showing the said bowl or globe broken away, and Fig. 3, is a perspective view showing the members constituting my invention sepa- Specification of Letters Patent.

Patented June 6, 1916.

Serial No. 32,309.

rated from each other and from the bowl or globe.

1n the use of inverted lighting fixtures it 1s lmportant to provide in the protecting bowl or globe sufiicient ventilation, and it is desirable to provide such ventilation from below, sothat the air passing through the openings is deflected around the inner wall of the bowl thus furnishing the required ventilation, which is necessary on account of the heat generated by the nitrogen lamp and breakage, due to uneven expansion of glass.

In order to supply the ventilation desired, and to provide means of cleaning the bowl and removal of all dirt accumulations and insects from the bowl, I provide the construction shown in the accompanying drawings, in which the lamp (not shown) is placed inside of a bowl or globe 2, which practically surrounds the lamp, and is symmetrical in outline. The bowl is open at the bottom for ventilation and for easy cleaning or inspection of the lamp. The bowl has no perforations; but at the opening at the bottom portion of the bowl is an annular casting 3, of brass or other suitable metal soldered, cemented, ,or otherwise rigidly and suitably secured to the bowl, said annular casting being adapted to receive and removably support a cup-shaped member or casting 4, the latter having a base portion 5 provided with a central opening for the reception of a setscrew 6 adapted to secure an ornamental knob or handle 7 to the base portion of the member 4:- The said member 4 is also provided with a series of longitudinal ventilating openings 8, an upper laterally extended fiat portion 9, adapted to contact with and rest against the bottom portion of the bowl and the lower surface of the annular ring or casting 3.

By reference to Figs. 2 and 3 it will be seen that the ring or casting 3 is provided with two slots or notches 10, diametrically opposite each other, and two semi-circular upwardly projecting portions 11, inclined gradually upward from one of the said slots or notches 10 to the other one, and has an outwardly and upwardly projecting rim portion 12, which is soldered, cemented or otherwise rigidly secured to the lower portion of the bowl, while the casting or member 4 is provided with upwardly extended integral guide or centering projections 13, and two upwardly projecting integral hook portions 141, which are adapted to register with and to be passed through the notches 10 in the annular casting 3, when by turning the member l by hand to the right the ends of the hook portions 1% will ride up the inclined projections 11, and cause the upper flat portion thereof to be drawn in contact and rest against the bottom of the bowl and the lower surface of the casting 3, and thereby lock the member l to the casting 3 against accidental removal or displacement.

When it is desired to remove the member l from the bowl for cleaning or other purposes, it is simply necessary to grasp the knob or handle 7, and. by turning it to the left the hook portions 14 will ride down the inclined projections until they reach the slots or notches 10, when they will readily drop through the said notches and the member 4 will become detached from the bottom of the bowl.

it will readily be perceived that the ventilating openings in the member A may be circular in shape or of any other suitable contour or configuration, adapted to serve the purpose.

it will be understood that my improved ventilating attachment may be readily ap plied to leaded bowls; blown glass or molded glass; edged glass or other types of piece bowls.

It will be obvious that slight changes may be resorted to in the precise details of the construction shown without departing from the spirit of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. A ventilating attachment for semi-indirect lighting fixture bowls comprising an annular casting rigidly and permanently secured to the lower portion of the bowl, and a member attached to and removed from said annular casting by turning the same to the right or to the left.

2. A ventilating attachment for semi-indirect lighting fixture bowls comprising, an annular casting rigidly secured to the lower portion of the bowl provided with notches and inclined semi-circular projections, and a removable member provided with upwardly projecting hook portions adapted to rest upon said. projections and support said re movable member against the underside of the bowl.

3. A ventilating attachment for semi-indirect lighting fixture bowls comprising, an annular casting rigidly secured to the lower portion of the bowl provided with notches and inclined semi-circular projections, and a removable member provided with integral centering and guiding projections, ventilat-. ing openings, an ornamental knob secured to the lower portion thereof, and integral upwardly projecting hook portions adapted vided with notches diametrically opposite each other and inclined semi-circular projections oppositely disposed to each other, and a removable member provided with ventilating openings, integral guiding and centering pins, and integral upwardly projecting hook portions adapted to register with and pass through the said notches and ride upon said semi-circular projections, thereby supporting said removable member against the underside of the bowl, and an ornamental knob or handle secured to the base portion of said removable member.

5. A ventilating attachment for semi-indirect lighting fixture bowls comprising, an annular casting rigidly secured to the lower portion of the bowl provided with notches and inclined semi-circular projections oppositely disposed to each other, and a removable member provided with a series of ventilating openings, and upwardly projecting integral hook portions adapted to pass through said notches and rest upon the upper surface of said semi-circular projections,

thereby supporting the said member against the underside of the bowl, and an ornamental knob or handle secured to the lower portion of the member, whereby by turning said handle to the right or left the said memher is attached to or detached from the bowl.

6. A ventilating and ornamental attach ment for semi-indirect lighting fixture bowls comprising, an annular casting fixedly and permanently secured around an opening in the lower central portion of the bowl, a member provided with means adapted to be fitted to said annular device, an ornamental handle secured to said. member, and means carried by said member for attaching it to or detaching it from the bowl by turning the member to the right or left.

7 A ventilating attachment for semi-indirect lighting fiXt-ure bowls comprising, an annular member rigidly and permanently secured to the lower end of the bowl, and another member provided with ventilating openings and having means for supporting it in contact with the lower surface of said annular member and removable therefrom immediately below the same.

In testimony whereof I affix my signature in presence of two witnesses.

ADOLPH COPELAND.

WVitnesses:

HUBERT D. Cnoonnn, DAVID M. BALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

